My 1995 525i , with 100K miles, has developed an odd "flapping" noise from up front. It sounds like a speedo cable that needs lubrication, but I seriously doubt that this car has a speedo cable.

It only occurs between 60 and 72 mph, and does not vary with the car or engine speed, or wether you are accelerating or decelerating. We looked under the car while on a lift, and could see nothing. I had hoped fo find a plastic bag stuck in the rear of the engine, but no such luck.

Pete, We had a similar problem with our 2002 530. Our issue was two smaller sized plastic panals under the car near the fron doors. The panals are thin in the middle and broke and flaped under the car
at free way speed.
Good luck